TWI689556B - Ink composition developable under X-ray - Google Patents

Abstract

An ink composition developable under X-rays, containing 12 to 32 parts of resin carrier, 10 to 70 parts of developing powder and 8 to 46 parts of solvent according to parts by weight, wherein the developing powder consists of 10 to 25% copper and sulfuric acid by weight Lead 0~10%, barium sulfate 45~75%, calcium carbonate 10~30% and aluminum hydroxide 0~10% powder composition, the developing powder has the characteristics of blocking or absorbing X-ray, is to use the ink of the present invention Print patterns or characters on the surface of documents and objects, so that the patterns or characters can be developed and detected under X-ray search.

Description

Ink composition developable under X-ray

The present invention relates to an ink suitable for printing, and particularly to a printing ink composition that can show an image when inspected by an X-ray machine.

"Ink" (Ink, Printing Ink) is a necessary material used in the printing process. The ink is attached to the surface of the object through the printing process or inkjet technology in the form of text or patterns, used for books, books, products, packaging, building materials Application level such as decoration and printed circuit; with the increase of social demand, the variety and application level of ink have also expanded and increased accordingly.

Commonly known ink components include at least "pigment", "carrier", "filler" and "auxiliary agent". "Pigment" is a colored substance with extremely fine particles, mixed in the ink to play the role of color. The main component of "carrier" is resin. The rheology, viscosity, pH value, color and water resistance of ink depend on resin carrier. "Filling material" is a white, transparent or opaque powdery substance used to adjust the consistency and fluidity of ink. "Auxiliaries" are some materials added to improve the performance of the ink itself in ink manufacturing and printing, such as dispersants, defoamers, thickeners, bacteriostats, etc.

The inks made from the above-mentioned main components can basically meet the needs of general printing, but in the actual implementation process, it is found that the characters or patterns printed by these inks are passed through the X-ray machine. Under detection, these words and drawings cannot be developed. However, in some implementation scenarios such as security inspections and special applications, it is necessary to develop these words or patterns, so how to develop a method that can be used in X-ray The ink developed next becomes the subject of the present invention.

In view of this, the main object of the present invention is to provide an ink composition containing materials that can block or absorb X-rays, so that patterns and characters can be developed under X-ray detection.

In order to achieve the above object, the means of the present invention is to provide an X-ray developable ink composition comprising 12 to 32 parts of resin carrier, 10 to 70 parts of developing powder and 8 to 46 parts of solvent water by weight. The developing powder is composed of 10-25% copper, 0-10% lead sulfate, 45-75% barium sulfate, 10-30% calcium carbonate, and 0-10% aluminum hydroxide powder.

The X-ray developable ink composition, wherein the resin carrier is selected from starch, dextrin, alginic acid, cellulose ester, cellulose ether, polyvinyl alcohol, polyvinyl methyl ester, polypropylene acetylene, polyethylene oxide, One or a combination of polyacrylic acid, alkyd resin, rosin maleic resin, epoxy resin, melamine resin, polyurethane, and polyester.

In the ink composition developable under X-rays, the diameter of the developed powder particles is 50 nm to 50 μm.

The X-ray developable ink composition further includes an auxiliary agent, and the auxiliary agent is 0.5 to 8 parts by weight, and the auxiliary agent includes at least one of a diluent, a slip agent, or a dispersant. The diluent contains ethanol. The slip agent contains polyethylene wax. The dispersant includes at least one of dialkylsulfosuccinate, alkylphenol polyvinyl ether, polyacrylic acid derivative, maleic anhydride copolymer, and polyphosphate.

After the above-mentioned resin carrier, developing powder, solvent and auxiliary agent are mixed according to the above ratio, they are preliminarily mixed into a paste by a stirrer; in order to make the composition evenly mixed, finally a three-roller mill is used to obtain the final Fine ink products.

The aforementioned developing powders are mainly inorganic powders such as metal powders or metal compounds. These inorganic powders have the property of blocking or absorbing X-rays. The ink composition that can be developed under the X-rays of the present invention is used to make printing inks for printing Make patterns or characters on the surface of documents and articles, so that these documents and articles can be found due to the development effect of the ink of the present invention when they pass the X-ray security inspection.

In order to develop the effect of X-ray development of the ink, the present invention improves the use of materials that cannot be penetrated by X-rays on the composition of the filler and does not affect the normal use characteristics of the ink.

The ink composition developable under X-rays of the present invention mainly includes a resin carrier, a developing powder and a solvent. If necessary, an auxiliary agent may be further added to adjust the physical and chemical properties of the ink. It contains 12 to 32 parts of resin carrier, 10 to 70 parts of developing powder and 8 to 46 parts of solvent by weight, and may further contain 0.5 to 8 parts of auxiliary agent.

The aforementioned resin carrier may be selected from starch, dextrin, alginic acid, cellulose ester, cellulose ether, polyvinyl alcohol, polyvinyl methyl ester, polypropylene amide, polyethylene oxide, polyacrylic acid, alkyd resin, rosin maleic acid One or more of resin, epoxy resin, melamine resin, polyurethane and polyester are mixed in any ratio. The above resin is one of the main components of the ink, which can not only control the viscosity of the ink, but also fix and disperse the ink composition, so that all the ingredients are evenly distributed.

The aforementioned developing powder is composed of copper 10~25%, lead sulfate 0~10%, barium sulfate 45~75%, calcium carbonate 10~30%, aluminum hydroxide 0~10% powder by weight percentage (the sum of the components is 100%), prepared in advance with a particle diameter of 50 nm ~ 50 microns. The above-mentioned developing powders are mainly inorganic powders such as metal powders or metal compounds. These inorganic powders have the characteristics of blocking or absorbing X-rays, so that the ink of the present invention can be formed from the monitoring screen under the X-ray machine. Review the development effect.

The aforementioned solvent is mainly water.

The aforementioned auxiliary agent includes a diluent, a slip agent or a dispersant, which accounts for 0.5 to 8 parts by weight of the entire ink; the diluent includes ethanol to reduce the overall viscosity of the ink; the slip agent includes a polyethylene wax to Improve the wear resistance and smoothness of printed products; the dispersant includes dialkyl sulfosuccinate, alkyl phenol polyvinyl ether, polyacrylic acid derivatives, maleic anhydride copolymer, polyphosphate, etc. One or more than two types to improve the water resistance and abrasion resistance of the ink.

<Example 1>

After mixing the resin carrier, developing powder, solvent and auxiliary agent according to the weight ratio in Table 1 below, it is preliminarily mixed into a paste by a stirrer, and finally ground with a three-roller grinder to obtain the final fine ink product. [Table 1] Material composition of Example 1

As shown in Figure 1, after printing 1 to 3 layers of text and test blocks on the front (A) and back (B) of a test paper with the ink, put the test paper in a storage bag to simulate the document The state of being hidden and carried.

Figure 2 is the inspection image of the test paper shown in Figure 1 when it passes through the X-ray machine; the test paper hidden in the storage bag can be seen from the image in the figure. When it passes the X-ray security check, it can be identified on the front and back of the paper On the text and test block. It can be seen from this embodiment that the printing ink made by using the ink composition developable under X-ray of the present invention can be used to print important documents and materials that should not be carried out, which can naturally improve the documents to be checked at the X-ray machine security inspection The probability of knowing, and has the additional function of preventing data leakage.

In summary, the ink composition that can be developed under X-rays of the present invention has indeed achieved its intended purpose, and has actually met the needs of the industry. It has filed a patent application according to the law, but anyone with ordinary knowledge in the technical field to which the present invention belongs , As a variety of alternative changes and variations can be done, so the scope of protection of the present invention shall be subject to the scope of the attached patent application.

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Figure 1 is a schematic diagram of the ink of the present invention implemented on the front and back of a test paper. Figure 2 is the detection image when the test paper shown in Figure 1 passes through the X-ray machine.

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Claims (7)

An ink composition that can be developed under X-rays includes, by weight, 12 to 32 parts of resin, a carrier, 10 to 70 parts of developing powder, and 8 to 46 parts of solvent water, wherein the developing powder is made of copper 10 to 10% by weight. 25%, lead sulfate 0~10%, barium sulfate 45~75%, calcium carbonate 10~30% and aluminum hydroxide 0~10% powder composition. The ink composition developable under X-rays as described in item 1 of the patent application scope, wherein the resin carrier is selected from starch, dextrin, alginic acid, cellulose ester, cellulose ether, polyvinyl alcohol, polyvinyl methyl ester, One or a combination of polypropylene, polyethylene oxide, polyacrylic acid, alkyd resin, rosin maleic resin, epoxy resin, melamine resin, polyurethane, and polyester. The ink composition that can be developed under X-rays as described in item 1 of the patent application range, wherein the diameter of the developed powder particles is 50 nm to 50 microns. The ink composition that can be developed under X-rays as described in Item 1 of the patent application scope further includes 0.5 to 8 parts of an auxiliary agent, and the auxiliary agent includes at least one of a diluent, a slip agent, or a dispersant. The ink composition developable under X-ray as described in item 4 of the patent application range, wherein the diluent contains ethanol. The ink composition developable under X-rays as described in item 4 of the patent application range, wherein the slip agent contains polyethylene wax. The ink composition that can be developed under X-rays as described in item 4 of the patent application range, wherein the dispersant contains dialkyl sulfosuccinate, alkyl phenol polyvinyl ether, polyacrylic acid derivative, maleic anhydride At least one of copolymer and polyphosphate.

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